enable flake8

.flake8

@@ -0,0 +1,12 @@
+[flake8]
+max-line-length = 88
+ignore =
+    # E203: whitespace before ':' (black fails to be PEP8 compliant)
+    E203
+    # E731: do not assign a lambda expression, use a def
+    E731
+    # W503: line break before binary operator (flake8 is not PEP8 compliant)
+    W503
+    # W504: line break after binary operator (flake8 is not PEP8 compliant)
+    W504
+show-source = True

MANIFEST.in

@@ -13,6 +13,7 @@ include COPYRIGHT.txt
 include pyproject.toml
 include setup.cfg
 include .coveragerc
+include .flake8
 include tox.ini
 include rtd.txt
 

tests/test_it.py

@@ -719,7 +719,7 @@ def stack(self):
         pf.inspect = MockInspect()
         self.assertEqual(pf.caller_package(), None)
 
-        import xml
+        import xml  # noqa F401
 
         pf.inspect.items = [(Mock(f_globals={"__name__": "xml"}),)]
 

tox.ini

@@ -51,8 +51,8 @@ skip_install = True
 commands =
     isort --check-only --df src/pyramid_jinja2 tests demo
     black --check --diff .
+    flake8 src/pyramid_jinja2/ tests demo
     check-manifest
-    # flake8 src/pyramid_jinja2/ tests demo
     # build sdist/wheel
     python -m build .
     twine check dist/*